The Revenge of the Flumphs

You put the flumph in the middle of a pentagram or smth idk how flumphs work. A portal is created where the flumphagram once was and a 100d20 undead flumphs emerge from the portal. The flumphs are under the control of the caster until the end of the spell duration.

Additionally, the caster, as a bonus action, can choose to conglomerate all remaining flumphs into a gargantuan Mega-Flumph™. The Mega-Flumph™ uses the tarrasque stat block except for HP which uses the total HP of all flumphs used in the construction of the Mega-Flumph™.

If the Mega-Flumph™ rolls a crit on any of its attacks, that damage is redirected to the DM. The DM has, for the purposes of the Mega-Flumph™,  7 HP. If knocked unconscious, the DM must succeed in a DC20 Constituiton-- Constituition? --Constituition? You know the one, saving throw or else the caster must shoot the DM irl and immediately call emergency services and accept all legal repercussions. If the DM survives the irl gunshot wound the Mega-Flumph™ instantaneously appears irl and kills the catser, confsuing law enforcement for years to come. Hehe... cum... sorry the fentanyl.